commit | 16ed7df34fd15f13592a38c5c7482a497d7a0ca2 | [log] [tgz] |
---|---|---|
author | Paul Berry <paulberry@google.com> | Mon Jul 18 14:51:24 2022 +0000 |
committer | Commit Bot <commit-bot@chromium.org> | Mon Jul 18 14:51:24 2022 +0000 |
tree | 03d15fd793f008844920c6df0f15ff4d72e06dd8 | |
parent | 145a9230de377dc1564ea563c55afbfa1912f102 [diff] |
Flow analysis: clarify behavior of ifNullExpression_rightBegin. Previously, it was unclear what information was stored in _IfNullExpressionContext._previous. It turned out that it was the "shortcut state", i.e. the flow state if the LHS of the `??` was non-`null`. I've renamed variables and added comments to clarify this. Also, based on the implementation of `ifNullExpression_rightBegin`, it looked like it might update `_current`, but in fact it did not (because `tryMarkNonNullable` always returns an `ExpressionInfo` whose `ifFalse` is unchanged); I've refactored the code so that this is clearer, and added a comment explaining why it is the right thing to do. Bug: https://github.com/dart-lang/language/issues/2020 Change-Id: Ib8a5235f9b9482f4b290ad90686385514660a95d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/251142 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Paul Berry <paulberry@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
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